Yes, mortars are terrifying for trenchers and infantry in general. Very effective and cheap but kinda short range? I have seen MLRS rockets releasing pellets with chutes but that means less destructive smaller warheads or AP mines....its important to take out critical node points and c&c in the very beginning stages in order not to collapse....I wonder how we would have fared if we were fighting Russia in place of UkraineAgree with this.
Instead of tactical light weight MLRS, better to go for heavy automatic mortars. Mortars are suited to mountain warfare much more than MLRS due to steep angle of firing. Moreover, even a 120mm mortar has the same lethal radius to a 155mm artillery round. Imagine 120mm or heck even 180mm mortars on motorized platforms.
Another idea better than MLRS at tactical ranges is the MRPKS, which IA is already pursuing.